// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
//
// Authors:
// Peter Bartok (pbartok@novell.com)
//
//
using System.Collections.Specialized;
using System.ComponentModel;
using System.Drawing;
using System.Security.Permissions;
namespace System.Web.UI.WebControls{
// CAS
[AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermissionAttribute (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
// attributes
[ValidationProperty("SelectedItem")]
#if NET_2_0
[SupportsEventValidation]
#endif
public class DropDownList : ListControl, IPostBackDataHandler {
#region Public Constructors
public DropDownList() {
}
#endregion // Public Constructors
#region Public Instance Properties
[Browsable(false)]
public override Color BorderColor {
get {
return base.BorderColor;
}
set {
base.BorderColor = value;
}
}
[Browsable(false)]
public override BorderStyle BorderStyle {
get {
return base.BorderStyle;
}
set {
base.BorderStyle = value;
}
}
[Browsable(false)]
public override Unit BorderWidth {
get {
return base.BorderWidth;
}
set {
base.BorderWidth = value;
}
}
[DefaultValue(0)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
[WebSysDescription ("")]
[WebCategory ("Misc")]
public override int SelectedIndex {
get {
int selected;
selected = base.SelectedIndex;
if ((selected != -1) || (Items.Count == 0)) {
return selected;
}
Items[0].Selected = true;
return 0;
}
set {
base.SelectedIndex = value;
}
}
#if ONLY_1_1
[Bindable(false)]
[Browsable(false)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
[EditorBrowsable(EditorBrowsableState.Never)]
public override string ToolTip {
get {
return string.Empty;
}
set {
}
}
#endif
#endregion // Public Instance Properties
#region Protected Instance Methods
protected override void AddAttributesToRender(HtmlTextWriter writer)
{
if (Page != null)
Page.VerifyRenderingInServerForm (this);
#if NET_2_0
if (writer == null)
return;
if (!String.IsNullOrEmpty (UniqueID))
writer.AddAttribute(HtmlTextWriterAttribute.Name, this.UniqueID, true);
if (!Enabled && SelectedIndex == -1)
SelectedIndex = 1;
#else
writer.AddAttribute(HtmlTextWriterAttribute.Name, this.UniqueID, true);
#endif
if (AutoPostBack) {
#if NET_2_0
string onchange = Page.ClientScript.GetPostBackEventReference (GetPostBackOptions (), true);
onchange = String.Concat ("setTimeout('", onchange.Replace ("\\", "\\\\").Replace ("'", "\\'"), "', 0)");
writer.AddAttribute (HtmlTextWriterAttribute.Onchange, BuildScriptAttribute ("onchange", onchange));
#else
writer.AddAttribute (HtmlTextWriterAttribute.Onchange,
BuildScriptAttribute ("onchange", Page.ClientScript.GetPostBackClientHyperlink (this, "")));
#endif
}
base.AddAttributesToRender(writer);
}
#if NET_2_0
PostBackOptions GetPostBackOptions () {
PostBackOptions options = new PostBackOptions (this);
options.ActionUrl = null;
options.ValidationGroup = null;
options.Argument = String.Empty;
options.RequiresJavaScriptProtocol = false;
options.ClientSubmit = true;
options.PerformValidation = CausesValidation && Page != null && Page.AreValidatorsUplevel (ValidationGroup);
if (options.PerformValidation)
options.ValidationGroup = ValidationGroup;
return options;
}
#endif
protected override ControlCollection CreateControlCollection() {
return base.CreateControlCollection();
}
#if ONLY_1_1
protected override void RenderContents(HtmlTextWriter writer) {
int count;
ListItem item;
bool selected;
if (writer == null) {
return;
}
count = Items.Count;
selected = false;
for (int i = 0; i < count; i++) {
item = Items[i];
writer.WriteBeginTag("option");
if (item.Selected) {
if (selected) {
throw new HttpException("DropDownList only may have a single selected item");
}
writer.WriteAttribute("selected", "selected", false);
selected = true;
}
writer.WriteAttribute("value", item.Value, true);
if (item.HasAttributes)
item.Attributes.Render (writer);
writer.Write(">");
string text = HttpUtility.HtmlEncode (item.Text);
writer.Write (text);
writer.WriteEndTag("option");
writer.WriteLine();
}
}
#endif
#if NET_2_0
protected internal override void VerifyMultiSelect ()
{
throw new HttpException ("DropDownList only may have a single selected item");
}
#endif
#endregion // Protected Instance Methods
#region Interface Methods
#if NET_2_0
protected virtual
#endif
bool LoadPostData (string postDataKey, NameValueCollection postCollection)
{
#if NET_2_0
EnsureDataBound ();
#endif
int index;
index = Items.IndexOf(postCollection[postDataKey]);
#if NET_2_0
ValidateEvent (postDataKey, postCollection [postDataKey]);
#endif
if (index != this.SelectedIndex) {
SelectedIndex = index;
return true;
}
return false;
}
#if NET_2_0
protected virtual
#endif
void RaisePostDataChangedEvent ()
{
#if NET_2_0
if (CausesValidation)
Page.Validate (ValidationGroup);
#endif
OnSelectedIndexChanged(EventArgs.Empty);
}
bool IPostBackDataHandler.LoadPostData (string postDataKey, NameValueCollection postCollection)
{
return LoadPostData (postDataKey, postCollection);
}
void IPostBackDataHandler.RaisePostDataChangedEvent ()
{
RaisePostDataChangedEvent ();
}
#endregion // Interface Methods
}
}
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